main {
  display: flex;
  align-items: center;
  flex-direction: column;
}

.container {
  width: 700px;
  display: inline-block;
  position: relative;
}

.container img {
  width: 100%;
  height: 100%;
}

.watermark {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
  white-space: nowrap;
  overflow: hidden;
}

.watermark span {
  line-height: 30px;
  display: inline-block;
  position: relative;
  top: 50%;
  transform: translateY(-50%);
  font: 'sans serif'
}

button {
  display: block;
  margin-top: 1rem;
  border: none;
  padding: 1rem 1.5rem;
  cursor: pointer;
  border-radius: 5px;
}

button:active {
  background-color: gainsboro;
}